Is it normal for vitiligo to be red for a long time after ultraviolet phototherapy? What should I do with it?

I'm glad to answer your question. According to your description above, this is the symptom of erythema reaction caused by excessive stimulation of ultraviolet phototherapy. But don't worry, you can stop phototherapy for 4-5 days and then reduce the light after the erythema goes down. For example, you used to light for 30 seconds, but now you can light 10 seconds. If it is not red, you can increase the dose one by one. It is suggested to increase it for 5 seconds at a time, and increase it slightly after irradiation. It is suggested that hot compress should be applied to the leukoplakia area before illumination, and then illumination should be applied after external application of drugs, which can enhance the curative effect.

I hope my answer can help you, and I hope you can recover soon!